Once UI 1.5 - Open-source designs for interactive + animated interactions

by
Once UI 1.5 is about bringing wonder back to UI engineering. We’re introducing new visual effects — weather, particles, matrix-style dots — all drop-in and usable in just a few lines of code. You also get a new generation of chart types built for live data and real-time dashboards. Only in Once UI. A toolkit for indie builders who want their product to feel alive, expressive, and unmistakably theirs.

Add a comment

Replies

Best
Thanks for stopping by. Once UI 1.5 grew out of the same curiosity that drives — experiments in motion, mood, and how interfaces feel, not just how they look. This update is our step toward more expressive, living interfaces: weather systems, particle fields, new forms of charts for real-time data. Ask me anything — happy to share the thinking behind it.

 Awesome update man, love it.

 It looks so stylish! Congrats!

Love what you’re doing with Once UI. How does Vibe Coding (MCP) integrate with Once UI? Can I use it to auto-generate UI components directly from design tokens?

 Vibe Coding works really nicely with Once UI because you can point the MCP server to the documentation ().

If you’re starting from one of our templates (portfolio, ecommerce, landing page, dashboard), the model gets strong context about the design system structure — spacing, tokens, components, naming, conventions, etc.

From there, you can:

  • ask the agent to scaffold new UI using Once UI components,

  • generate pages that follow the design tokens,

  • refactor or extend existing components,

  • or use our copy-paste blocks as building primitives for new screens.

The more Once UI code you have in your repo, the better agents understand the patterns — and the more accurate the generated components become!

Love how 1.5 continues the core Once UI philosophy - interfaces with mood, motion, and personality.


The weather + particle effects unlock so many expressive use-cases, especially paired with the new real-time data charts.

Proud to be contributing. Every update feels like we’re bending code into something living.

Once UI is the first toolkit that actually feels like art. ✨

 The weather effects, the particles, the motion primitives… They’re the kind of details that turn an interface into an experience, not just a layout.

I’m glad we get to build this together. We’re not just shipping features — we’re shaping a new way to express ideas through code.

Congrats.. big fan of design systems.. 🚀🚀

 Thanks! Hope you'll like Once UI's unique approach to simplifying design and development :)

Very useful; it would be interesting to see how it performs in real time! Congratulations on the launch!

 Thank you - you can check some examples on the , and many amazing apps are about to be released in the upcoming months, so stay tuned!

Love the update! Which part of UI 1.5 was the hardest to build, the weather system or the particle fields?

 Appreciate it! I would say it was the MatrixFx, a canvas based component that can be customized with props (density, strength, colors, flicker, etc.) - it's really heavy and required very careful optimization to provide a smooth visual effect while being easy on the hardware.

Seems like a great alternative to doing it manually! I'm excited to have these for our UI

 Happy to hear! Let me know how the integration goes.

This looks super nice - as an absolute beginner when it comes to all this stuff, can one use Once UI to create beautiful elements for their Squarespace/Wordpress site?

 Once UI is built on top of Next.js, so it's unfortunately not compatible with WordPress or SquareSpace, but we have simple, easy-to-use templates to get you started, such as :)

that sounds great! Thanks for the reply 😊

his toolkit empowers indie builders to elevate their product’s UI personality without sacrificing development efficiency.

Do you plan to expand compatibility with additional frontend frameworks (e.g., React Native) to enable these components in mobile apps? Also, will there be pre-built UI templates that combine these animated effects with common layout patterns (e.g., SaaS onboarding flows)?

congrats! looks nice. QQ - does it support webflow and other types of implementation?

12
Next